Quartz Movement – Digital Function – Day & Date – LED Light – Daily Alarm – Hourly Time Signal – 1/100 Stop Watch – Auto Calendar – 12/24 Hour-Format. 38.2mm x 35.2mm x 8.5mm Black Resin Stainless Steel Square Case – Resin Glass – Solid Caseback – Easy to Press Button Arrangement. Digital Dial with Green Accents- Black Digital Font and Arabic Numbers. Black Resin Strap with Black Pin Buckle.Water Resistant to 50 Metres 5ATM Please press and hold the button from the right side for a few seconds and the CASIO sign should come up